Vampires—supernatural, blood-drinking, dead humans—are a worldwide myth...most of the time. Some stories are difficult to classify as fiction.     Thursday, October 27, 6:30 p.m. at the Stribling Room of the Mason Co. M. Beven Eckert Memorial Library (located at 410 Post Hill Street), John L. Davis will talk about whether vampires have appeared in places other than questionable books and bad movies.     Some time ago, as a university teacher of rhetoric and ...